Tank-closure.



B. A. LAKE.

TANK CLOSURE.

APPLICATION FILED APR. 14, 1910.

Patented Sept. 27, 1910. I

1/91 bu e m co wuemtoc ark drum:

THE NORRIS PEIL'AS co., wnsnmcrou u c BERTUS A. LAKE, OF BIGPRAIRIE, OHIO.

TANK-CLOSURE.

To all whom it may concern:

Be it known that I, Bnu'rns A. LAKE, a citizen of the United States, residing at Bigprairie, in the county of Holmes and State of Ohio, have invented certain new and useful Improvements in Tank-Closures; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in tank closures.

One object of the invention is to provide means whereby the threaded upper end of the tank is reinforced and rigidly braced so that the threads thereon will be held in close engagement with the threads of the cover thereby firmly holding the latter in place on the tank.

l/Vith the foregoing and other objects in view the invention consists of certain novel features of construction, combination and arrangement of parts as will be more fully described and particularly pointed out in the appended claim.

In the accompanying drawings: Figure l is a central vertical section of a tank and closure constructed in accordance with the invention; Fig. 2 is an enlarged cross sectional View of the reinforcing ring removed from the tank.

Referring more particularly to the drawings 1 denotes the sheet metal tank 011 the outer surface of which adjacent to its upper edge is formed screw threads 2 with which are adapted to be engaged the top 3 of the tank. The tank 1 may be of any desired size and employed for any suitable purpose.

Adapted to be engaged with the upper inner portion of the tank is a reinforcing ring 4 said ring fitting within and having a close engagement with the inner surface of the tank adjacent to its upper edge. On the upper edge of the ring 4 is formed an outwardly projecting annular flange 5 which when the ring is in place in the tank is adapted to fit over and engage the upper edge of the tank as shown. On the inner side of the ring 4 adjacent to its lower edge is formed an inwardly projecting annular bead or rib 6 whereby said ring is strengthened and stiffened.

The cover 3 of the tank may be of any suitable shape and has formed on its inner Specification of Letters Patent.

Application filed April 14, 1910.

Patented Sept. 27, 1910.

Serial No. 555,361.

side adjacent to its lower edge an annular groove or recess 7 which is interiorly threaded and is adapted to be screwed into engagement with the threads 2 on the upper edge of the tank 1. The annular groove or recess 7 in the cover forms an annular shoulder 8 which when. the cover is screwed down onto the upper end of the tank engages the flange 5 on the reinforcing ring thereby forming a tight closure for the tank. The flange 5 of the reinforcing ring serves to prevent said ring from slipping down into the tank and holds the same in position to brace the threaded upper edge of the tank. It will be noted that the inner or lower edge of the reinforcing ring I projects down into the tank to a point slightly below the lower edge of the cover 7 thus bracing or reinforcing the tank a short distance below the threaded upper portions thereof.

By means of a tank closure constructed and arranged as herein shown and described the upper threaded ends of sheet metal tanks will be rigidly braced and protected against indentation and the threads thereon will be held into close engagement with the threads of the cover thereby providing a tight joint between the cover and the tank.

From the foregoing description taken in connection with the accompanying drawings the construction and operation of the invention will be readily understood without requiring a more extended explanation.

Various changes in the form, proportion and the minor details of construction may be resorted to without departing from the principle or sacrificing any of the advantages of the invention as defined in the appended claim.

Having thus described my invention what I claim is:

In a tank of the character described, a series of threads arranged around the upper edge thereof, a reinforcing ring arranged within and engaging the upper edge of the tank said ring having on its lower edge an inwardly projecting strengthening bead, an annular outwardly projecting flange formed on the upper end of said ring and adapted to engage the upper edge of the tank, a cover having an interiorly threaded recess or groove formed on its lower inner edge and adapted to be screwed into engagement with the threaded upper edge of the tank, said groove or recess forming an annular shoulder adapted to fit against the flange 011 the upper end of said reinforcing ring, said ring having a Width snllicient to project forwardly in the tank a slight distance below the lower edge of the cover.

In testimony whereof I have hereunto set my hand 1n presence of two subscrlbing witnesses.

BERTUS A. LAKE. WVitnesses R. R. STERLING, VERA GARRETT. 

